Bridge-wall for boilers



Feb. 27, 1923. 1,446,937. P. J. SHANAHAN.

BRIDGE WALL FOR BOILERS.

FILED MAY 22 I920- 2 SHEETS-SHEET ln TTORNEYJZ & DH E H 0 M R M A HI. IL S IE DIG D .R B

Feb. 27, 1923.

2 SHEETSSHEET 2.

FILED MAY 22,1920.

00000000 W 0 m00000000w .1: A 11 Q fl INVENTQF Patented Feb. 237, 1923.

PATRICK J. snennnsn, OF IN'EVV ORLEANS, LOUISIANA.

BRIDGE-HALL FOB BOILERS.

Application filed May 22, 1920. Serial No. 383,484.

To aZZ whom it may concern:

Be it known that l, Pn'rnron J. SHANA- HAN, a citizen of the United States, residing at New Orleans, in the parish of Orleans and of Louisiana, have invented new and useful Improvements in Bridge l Valls for Boilers, of which the following is a specification.

My present invention pertains to boilers, and it contemplates the provision. in a boiler of means whereby a great saving of fuel is aecoi'nplished and this without ailecting the heat radiating from the fuel in any degree.

The invention further contemplates the PI'OJiSlOIQ in a boiler of means whereby the flame from the heat is prevented iirom breaking and is carried upwardly and in a continuous manner and thus perfect combustion of the heat products is assured.

The invention will be fully understood from the following description and claim when the same are read in connection with the drawings, accompanying and forming part of this specification in which Figure l, is a side elevation of aboiler and showing the fire confining walls in section.

Figure 2, is a section taken through the center drum and in the plane indicated by line 22 of Fig. 1.

Similar numerals of reference designate corresponding parts in both views of the drawings.

Theboiler and its supports are of the construction shown or may be any other construction and are provided with the fire tubes andat this point I would distinctly have it understood that the boiler and tubes constitute no part of my invention.

- Arranged at the forward end of the boiler is the fire box 2 and torming the bottom of the be 2 are the grate bars 3.

Extending upwardly from the rear of grate bars 3 at an angle is a wall. l and at its upper end this wall 1 merges into a bridge 'Wl-ll 5. t

The bridge wall 5 comprises the essential te t ire of my invention and said. wall is ar 'ed approximately 5 inches from the bottom surface or the boiler. This wall 5 comprises a portion 6; and said portion is constructed so that it surrounds in semi-circular manner the under side of the boiler. By reference to Fig. 2 it will be seen that the portion 6 is slightly increased in thickness toward the rear of the boiler and thus the space between the boiler and wall is slightly decreased away from the wall 5. At its in nor end the portion 6 is secured to a rear wall. 7 that has the arch S. This construction will force the flame that travels over the bridge wall 5 to be confined closer to the boiler the further it passes to the rear of the device. v

Because of the above mentioned construction. the flame will have a continuous upward passage and hence said flame is unbroken inits upward passage assuringpertest combustion all times. This will manil'estly cause more heat to be derived from the fuel and said fuel will produce less smoke for passage to the tubes of the boiler.

It will be gathered from the foregoing that the invention is simple in construction and may 'e installed in any type of boiler now in general use with but slight expenditure oi. money.

Having; described my invention, what I claim and desire to secure by letters-Patent In means for the purpose set forth, the combination of a boiler, a fire box arranged beneath the forward end of the boiler, an in clined wall formed. in rear of the fire box and sloping upwardly toward the boiler, an inclined wall pitched upwardly toward the rear of the. boiler and abuting an arch wall in rear of the boiler, and a bridge wall formed at the forward end of the last named inclined wall and abutting; a q'ainstthe upper end of the inclined wall that is arranged in rear ot'the fire box; said bridge wall terminating" slightly below the boiler, and. adapted to surround the sides and bottom of said.

boiler.

In testimony whereof I. have hereunto set my hand in presence of two subscribing witnesses.

' PATRICK J. SHANAHAN. Vi tnesses JOHN L. FnLnN, CARL A. CONRAD. 

